Powered by an Extreme Li-Ion Battery Fast recycle time of 1.5 sec (4x faster than AA power) Up to 600 shots at full power Up to 1000 shots at 1/2 power Built-in 2.4GHz wireless receiver & transmitterThe Package includes: Hahnel Modus 600RT TTL Speedlight HLX-MD1 Li-Ion Battery Pack (11.1V, 2000mAh) MD1 Battery Charger with Power Cable Mini Stand Protective CaseThe Hahnel Modus 600RT is a full feature unit that powered by a single lithium-ion battery, it boast a powerful guide at ISO100 and 200mm without compromising the speed, as the recycle times is 1.5 seconds or lower. equiped with 2.4GHz transceiver, allow the user to easily sync the speedlight with compatible remote up to 100m away Unique wireless connectivity High performance 60GN at ISO 100, 200mm TTL, Manual & Multi Modes Firmware update via integrated USB Quick-lock hot shoe Ultra-compact MD1 MK II USB powered chargerGuide No: 60GN at ISO 100, 200mm Flash Coverage: Swinging / tilting flash head (bounce flash):0 to 360 degree horizontally & -7 degrees to 90 degrees vertically Flash Duration: 1/300 to 1/20,000 seconds, Diffuser Panel, Catch Light Panel Wireless flash function: 2.4 GHz: up to 5 groups, up to 100m range, Optical: up to 3 groups, 5-10m range (Canon, Nikon, Sony) Power Source: 11.1V 2000mAh Li-Ion. Power saving function Recycle Time: <1.5 seconds Full power flashes: Approx. 600 Colour Temperature: 5600K